131 lines
5.4 KiB
C#
131 lines
5.4 KiB
C#
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using System;
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using System.Linq;
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using UnityEngine;
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using UnityEngine.Playables;
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using UnityEngine.Timeline;
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using Object = UnityEngine.Object;
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namespace UnityEditor.Timeline
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{
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static class BindingUtility
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{
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public enum BindingAction
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{
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DoNotBind,
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BindDirectly,
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BindToExistingComponent,
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BindToMissingComponent
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}
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const string k_BindingOperation = "Bind Track";
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public static void Bind(PlayableDirector director, TrackAsset bindTo, Object objectToBind)
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{
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if (director == null || bindTo == null || TimelineWindow.instance == null)
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return;
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if (director.GetGenericBinding(bindTo) == objectToBind)
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return;
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TimelineWindow.instance.state.previewMode = false; // returns all objects to previous state
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TimelineUndo.PushUndo(director, k_BindingOperation);
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director.SetGenericBinding(bindTo, objectToBind);
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TimelineWindow.instance.state.rebuildGraph = true;
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}
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public static void BindWithEditorValidation(PlayableDirector director, TrackAsset bindTo, Object objectToBind)
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{
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TrackEditor trackEditor = CustomTimelineEditorCache.GetTrackEditor(bindTo);
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Object validatedObject = trackEditor.GetBindingFrom_Safe(objectToBind, bindTo);
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Bind(director, bindTo, validatedObject);
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}
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public static void BindWithInteractiveEditorValidation(PlayableDirector director, TrackAsset bindTo, Object objectToBind)
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{
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TrackEditor trackEditor = CustomTimelineEditorCache.GetTrackEditor(bindTo);
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if (trackEditor.SupportsBindingAssign())
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BindWithEditorValidation(director, bindTo, objectToBind);
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else
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{
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Type bindingType = TypeUtility.GetTrackBindingAttribute(bindTo.GetType())?.type;
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BindingAction action = GetBindingAction(bindingType, objectToBind);
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if (action == BindingAction.BindToMissingComponent)
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InteractiveBindToMissingComponent(director, bindTo, objectToBind, bindingType);
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else
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{
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var validatedObject = GetBinding(action, objectToBind, bindingType);
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Bind(director, bindTo, validatedObject);
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}
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}
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}
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public static BindingAction GetBindingAction(Type requiredBindingType, Object objectToBind)
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{
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if (requiredBindingType == null || objectToBind == null)
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return BindingAction.DoNotBind;
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// prevent drag and drop of prefab assets
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if (PrefabUtility.IsPartOfPrefabAsset(objectToBind))
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return BindingAction.DoNotBind;
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if (requiredBindingType.IsInstanceOfType(objectToBind))
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return BindingAction.BindDirectly;
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var draggedGameObject = objectToBind as GameObject;
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if (!typeof(Component).IsAssignableFrom(requiredBindingType) || draggedGameObject == null)
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return BindingAction.DoNotBind;
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if (draggedGameObject.GetComponent(requiredBindingType) == null)
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return BindingAction.BindToMissingComponent;
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return BindingAction.BindToExistingComponent;
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}
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public static Object GetBinding(BindingAction bindingAction, Object objectToBind, Type requiredBindingType)
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{
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if (objectToBind == null) return null;
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switch (bindingAction)
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{
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case BindingAction.BindDirectly:
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{
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return objectToBind;
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}
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case BindingAction.BindToExistingComponent:
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{
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var gameObjectBeingDragged = objectToBind as GameObject;
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Debug.Assert(gameObjectBeingDragged != null, "The object being dragged was detected as being a GameObject");
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return gameObjectBeingDragged.GetComponent(requiredBindingType);
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}
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case BindingAction.BindToMissingComponent:
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{
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var gameObjectBeingDragged = objectToBind as GameObject;
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Debug.Assert(gameObjectBeingDragged != null, "The object being dragged was detected as being a GameObject");
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return Undo.AddComponent(gameObjectBeingDragged, requiredBindingType);
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}
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default:
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return null;
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}
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}
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static void InteractiveBindToMissingComponent(PlayableDirector director, TrackAsset bindTo, Object objectToBind, Type requiredComponentType)
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{
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var gameObjectBeingDragged = objectToBind as GameObject;
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Debug.Assert(gameObjectBeingDragged != null, "The object being dragged was detected as being a GameObject");
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string typeNameOfComponent = requiredComponentType.ToString().Split(".".ToCharArray()).Last();
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var bindMenu = new GenericMenu();
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bindMenu.AddItem(
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EditorGUIUtility.TextContent("Create " + typeNameOfComponent + " on " + gameObjectBeingDragged.name),
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false,
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nullParam => Bind(director, bindTo, Undo.AddComponent(gameObjectBeingDragged, requiredComponentType)),
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null);
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bindMenu.AddSeparator("");
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bindMenu.AddItem(EditorGUIUtility.TrTextContent("Cancel"), false, userData => {}, null);
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bindMenu.ShowAsContext();
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}
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}
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}
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